8. let p = (2, 0, 1), q = (3, 1, 0) and r = (4, 3, 5). (a) find the level set equation of the plane, p, containing p, q, and r. (b) find a parametrization of the plane, p, containing p, q, and r. (c) let l be the line passing through the point (−1, 0, 2) that is parallel to the vector (1, 2, 3). find the point of intersection of this line with the plane, p. (d) is the line through the points (2, 4, −5) and (0, 1, 3) parallel to the plane, p? explain why or why not.